hello , I have this machine since October 2011 and it have this horrible hum to it since I buy it so I never really use it that much . I `` finally '' run into a post that say to try a better power supply . I swap out the power supply with a better , regulate power supply -lrb- input 100-240v , output 12v -rrb- and `` finally '' no more buzz ! the clock work like a charm now . you can find a replacement power supply at you local Radio Shack or computer store . they be not expensive . thanks so much to Matthew for the power supply tip and another gentleman who suggest to open up the clock and bend a few of the led to the back so the display would not be so bright . be sure to tighten the display plate when put the clock back together since it be pressure sensitive . two very easy fix and the sound soother now work nicely without any issue !